[lionne]

 Hi all,
Could anyone check if there is banding with the ISO / BDMV UHD HDR
  It would be kind of you   

I can confirm horrible banding with 12-bit YCbCr 4:4:4 or 4:2:2 modes. I didn't really expect it to be this bad. There is no banding with 10-bit 4:4:4/4:2:2 output. I will post some screen capture shots soon.

It is also interesting that YCbCr 4:4:4 mode refresh rate is 24Hz instead of 23.976Hz. It switches to 24Hz both in Auto Color space mode and when 4:4:4 is selected manually. Wonder why no one is complaining about stutter.   

 Are you saying that if you select YCbCr 4:4:4, the 23.976 material is output as 24.000? If so, this player will be going back promptly, as that is unacceptable and I could not live with the stutter.